721411972 has 12 divisors (see below), whose sum is σ = 1280252736. Its totient is φ = 355625480.

The previous prime is 721411961. The next prime is 721412011. The reversal of 721411972 is 279114127.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1269808 + ... + 1270375.

It is an arithmetic number, because the mean of its divisors is an integer number (106687728).

Almost surely, 2^721411972 is an apocalyptic number.

It is an amenable number.

721411972 is a deficient number, since it is larger than the sum of its proper divisors (558840764).

721411972 is a wasteful number, since it uses less digits than its factorization.

721411972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540258 (or 2540256 counting only the distinct ones).

The product of its digits is 7056, while the sum is 34.

The square root of 721411972 is about 26859.1133881966. The cubic root of 721411972 is about 896.8664572946.

The spelling of 721411972 in words is "seven hundred twenty-one million, four hundred eleven thousand, nine hundred seventy-two".